Cleanup okhttp usage

app/src/main/kotlin/com/hippo/ehviewer/client/EhCookieStore.kt

@@ -9,7 +9,6 @@ import io.ktor.http.Cookie
 import io.ktor.http.Url
 import io.ktor.http.parseClientCookiesHeader
 import io.ktor.http.renderSetCookieHeader
-import okhttp3.HttpUrl
 
 object EhCookieStore : CookiesStorage {
     private val manager = CookieManager.getInstance()
@@ -42,10 +41,6 @@ object EhCookieStore : CookiesStorage {
         }
     }
 
-    fun deleteCookie(url: HttpUrl, name: String) {
-        manager.setCookie(url.toString(), "$name=;Max-Age=0")
-    }
-
     fun addCookie(k: String, v: String, domain: String) {
         val cookie = Cookie(name = k, value = v, domain = domain, maxAge = Int.MAX_VALUE)
         val url = if (EhUrl.DOMAIN_E == cookie.domain) EhUrl.HOST_E else EhUrl.HOST_EX

app/src/main/kotlin/com/hippo/ehviewer/ktbuilder/Okhttp.kt

@@ -3,4 +3,3 @@ package com.hippo.ehviewer.ktbuilder
 import okhttp3.OkHttpClient
 
 inline fun httpClient(builder: OkHttpClient.Builder.() -> Unit): OkHttpClient = OkHttpClient.Builder().apply(builder).build()
-inline fun httpClient(client: OkHttpClient, builder: OkHttpClient.Builder.() -> Unit): OkHttpClient = client.newBuilder().apply(builder).build()